Filter element



FIG. 1 is a perspective view showing the new design for a filter element;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof

FIG. 5 is a left view thereof; and,

FIG. 6 is a top view thereof, the bottom being a mirror image thereof.

In the drawings, the dash-dash broken lines illustrate environment and form no part of the claimed design, and any shading is provided to illustrate contour only and is not an indication of texture, gloss, etc.

The dot-dash broken lines in the figures immediately adjacent the solid lines represent a boundary between claimed and unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a filter element, as shown and described. 